From: Paul Eggert <eggert@cs.ucla.edu>
To: Siddhesh Poyarekar <siddhesh@sourceware.org>
Cc: fweimer@redhat.com, libc-alpha@sourceware.org, dickey@his.com
Subject: Re: [PATCH v3] wcrtomb: Make behavior POSIX compliant
Date: Thu, 12 May 2022 22:28:47 -0700 [thread overview]
Message-ID: <ef7fb821-e0a4-ab32-ef77-06ebd7dd953b@cs.ucla.edu> (raw)
In-Reply-To: <4ffe566a-8002-b574-daee-d6927b8ceaef@cs.ucla.edu>
On 5/12/22 21:56, Paul Eggert wrote:
> Hope you don't mind my bikeshedding.
Better yet, this:
s[0] = buf[0];
if (2 <= result && result <= 4)
{
s[1] = buf[1];
memcpy (&s[result - 2], &buf[result - 2], 2);
}
else
memcpy (s, buf, result);
On x86-64 with GCC 12.1 -O2 and a glibc-supplied charmap, this is only 9
straight-line instructions, counting the compare insn and the
conditional-branch insn that is never taken.
next prev parent reply other threads:[~2022-05-13 5:28 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-07 6:26 [RFC] _FORTIFY_SOURCE strictness Siddhesh Poyarekar
2022-04-07 10:16 ` Andreas Schwab
2022-04-08 3:24 ` Siddhesh Poyarekar
2022-04-08 2:26 ` Paul Eggert
2022-04-08 3:32 ` Siddhesh Poyarekar
2022-04-08 5:37 ` Florian Weimer
2022-04-08 6:02 ` Siddhesh Poyarekar
2022-04-08 21:07 ` Paul Eggert
2022-04-11 8:02 ` Siddhesh Poyarekar
2022-05-05 18:43 ` [PATCH 0/2] More compliant wcrtomb Siddhesh Poyarekar
2022-05-05 18:43 ` [PATCH 1/2] benchtests: Add wcrtomb microbenchmark Siddhesh Poyarekar
2022-05-06 9:10 ` Florian Weimer
2022-05-06 12:49 ` [committed] " Siddhesh Poyarekar
2022-05-06 12:50 ` [PATCH 1/2] " Adhemerval Zanella
2022-05-06 12:59 ` Siddhesh Poyarekar
2022-05-06 13:20 ` Adhemerval Zanella
2022-05-06 13:26 ` Siddhesh Poyarekar
2022-05-06 13:36 ` Siddhesh Poyarekar
2022-05-06 13:46 ` Adhemerval Zanella
2022-05-05 18:43 ` [PATCH 2/2] wcrtomb: Make behavior POSIX compliant Siddhesh Poyarekar
2022-05-06 9:25 ` Paul Eggert
2022-05-06 13:40 ` Adhemerval Zanella
2022-05-06 13:46 ` Siddhesh Poyarekar
2022-05-06 14:04 ` [PATCH v2] " Siddhesh Poyarekar
2022-05-09 13:22 ` Adhemerval Zanella
2022-05-09 13:35 ` Siddhesh Poyarekar
2022-05-12 13:15 ` [PATCH v3] " Siddhesh Poyarekar
2022-05-13 4:56 ` Paul Eggert
2022-05-13 5:28 ` Paul Eggert [this message]
2022-05-13 11:31 ` Siddhesh Poyarekar
2022-05-13 11:38 ` Florian Weimer
2022-05-13 11:51 ` Siddhesh Poyarekar
2022-05-13 12:55 ` Florian Weimer
2022-05-13 12:30 ` Adhemerval Zanella
2022-05-13 13:42 ` Siddhesh Poyarekar
2022-05-13 17:58 ` Paul Eggert
2022-05-13 13:45 ` [committed] " Siddhesh Poyarekar
2022-05-13 8:18 ` [PATCH v3] " Siddhesh Poyarekar
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